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freebsd-skq/lib/libgeom/geom_xml2tree.c
Juli Mallett 019100de26 Back out r233646. Although it fixed most libgeom consumers under 32-bit 
compatibility, it broke programs using devstat, under 32-bit compatibility and
not.

It's very difficult to fix the identifiers used by devstat, so this change is
simply being backed out.  Since changes to 3rd-party code seem likely, and may be
necessary to properly fix 32-bit binaries on 64-bit kernel, it would seem better
to make more invasive changes to fix GEOM's problems with 32-bit compatibility in
general.

The right thing to do is to replace all of the use of pointers as opaque
identifiers with a fixed-size (64-bit or even 32-bit should be enough for tracking
unique GEOM elments) field.  That probably maintains source compatibility with
most GEOM consumers, and allows xml2tree to make better assumptions about how to
decode the identifiers.

Submitted by:	Anton Yuzhaninov
2012-04-10 17:37:24 +00:00

493 lines
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/*-
* Copyright (c) 2003 Poul-Henning Kamp
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The names of the authors may not be used to endorse or promote
* products derived from this software without specific prior written
* permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
#include <stdio.h>
#include <inttypes.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include <fcntl.h>
#include <ctype.h>
#include <sys/stat.h>
#include <sys/mman.h>
#include <sys/queue.h>
#include <sys/sbuf.h>
#include <sys/sysctl.h>
#include <err.h>
#include <bsdxml.h>
#include <libgeom.h>
struct mystate {
struct gmesh *mesh;
struct gclass *class;
struct ggeom *geom;
struct gprovider *provider;
struct gconsumer *consumer;
int level;
struct sbuf *sbuf[20];
struct gconf *config;
int nident;
};
static void
StartElement(void *userData, const char *name, const char **attr)
{
struct mystate *mt;
void *id;
void *ref;
int i;
mt = userData;
mt->level++;
mt->sbuf[mt->level] = sbuf_new_auto();
id = NULL;
ref = NULL;
for (i = 0; attr[i] != NULL; i += 2) {
if (!strcmp(attr[i], "id")) {
id = (void *)strtoul(attr[i + 1], NULL, 0);
mt->nident++;
} else if (!strcmp(attr[i], "ref")) {
ref = (void *)strtoul(attr[i + 1], NULL, 0);
} else
printf("%*.*s[%s = %s]\n",
mt->level + 1, mt->level + 1, "",
attr[i], attr[i + 1]);
}
if (!strcmp(name, "class") && mt->class == NULL) {
mt->class = calloc(1, sizeof *mt->class);
if (mt->class == NULL) {
warn("Cannot allocate memory during processing of '%s' "
"element", name);
return;
}
mt->class->lg_id = id;
LIST_INSERT_HEAD(&mt->mesh->lg_class, mt->class, lg_class);
LIST_INIT(&mt->class->lg_geom);
LIST_INIT(&mt->class->lg_config);
return;
}
if (!strcmp(name, "geom") && mt->geom == NULL) {
mt->geom = calloc(1, sizeof *mt->geom);
if (mt->geom == NULL) {
warn("Cannot allocate memory during processing of '%s' "
"element", name);
return;
}
mt->geom->lg_id = id;
LIST_INSERT_HEAD(&mt->class->lg_geom, mt->geom, lg_geom);
LIST_INIT(&mt->geom->lg_provider);
LIST_INIT(&mt->geom->lg_consumer);
LIST_INIT(&mt->geom->lg_config);
return;
}
if (!strcmp(name, "class") && mt->geom != NULL) {
mt->geom->lg_class = ref;
return;
}
if (!strcmp(name, "consumer") && mt->consumer == NULL) {
mt->consumer = calloc(1, sizeof *mt->consumer);
if (mt->consumer == NULL) {
warn("Cannot allocate memory during processing of '%s' "
"element", name);
return;
}
mt->consumer->lg_id = id;
LIST_INSERT_HEAD(&mt->geom->lg_consumer, mt->consumer,
lg_consumer);
LIST_INIT(&mt->consumer->lg_config);
return;
}
if (!strcmp(name, "geom") && mt->consumer != NULL) {
mt->consumer->lg_geom = ref;
return;
}
if (!strcmp(name, "provider") && mt->consumer != NULL) {
mt->consumer->lg_provider = ref;
return;
}
if (!strcmp(name, "provider") && mt->provider == NULL) {
mt->provider = calloc(1, sizeof *mt->provider);
if (mt->provider == NULL) {
warn("Cannot allocate memory during processing of '%s' "
"element", name);
return;
}
mt->provider->lg_id = id;
LIST_INSERT_HEAD(&mt->geom->lg_provider, mt->provider,
lg_provider);
LIST_INIT(&mt->provider->lg_consumers);
LIST_INIT(&mt->provider->lg_config);
return;
}
if (!strcmp(name, "geom") && mt->provider != NULL) {
mt->provider->lg_geom = ref;
return;
}
if (!strcmp(name, "config")) {
if (mt->provider != NULL) {
mt->config = &mt->provider->lg_config;
return;
}
if (mt->consumer != NULL) {
mt->config = &mt->consumer->lg_config;
return;
}
if (mt->geom != NULL) {
mt->config = &mt->geom->lg_config;
return;
}
if (mt->class != NULL) {
mt->config = &mt->class->lg_config;
return;
}
}
}
static void
EndElement(void *userData, const char *name)
{
struct mystate *mt;
struct gconfig *gc;
char *p;
mt = userData;
sbuf_finish(mt->sbuf[mt->level]);
p = strdup(sbuf_data(mt->sbuf[mt->level]));
if (p == NULL) {
warn("Cannot allocate memory during processing of '%s' "
"element", name);
return;
}
sbuf_delete(mt->sbuf[mt->level]);
mt->sbuf[mt->level] = NULL;
mt->level--;
if (strlen(p) == 0) {
free(p);
p = NULL;
}
if (!strcmp(name, "name")) {
if (mt->provider != NULL) {
mt->provider->lg_name = p;
return;
} else if (mt->geom != NULL) {
mt->geom->lg_name = p;
return;
} else if (mt->class != NULL) {
mt->class->lg_name = p;
return;
}
}
if (!strcmp(name, "rank") && mt->geom != NULL) {
mt->geom->lg_rank = strtoul(p, NULL, 0);
free(p);
return;
}
if (!strcmp(name, "mode") && mt->provider != NULL) {
mt->provider->lg_mode = p;
return;
}
if (!strcmp(name, "mode") && mt->consumer != NULL) {
mt->consumer->lg_mode = p;
return;
}
if (!strcmp(name, "mediasize") && mt->provider != NULL) {
mt->provider->lg_mediasize = strtoumax(p, NULL, 0);
free(p);
return;
}
if (!strcmp(name, "sectorsize") && mt->provider != NULL) {
mt->provider->lg_sectorsize = strtoul(p, NULL, 0);
free(p);
return;
}
if (!strcmp(name, "stripesize") && mt->provider != NULL) {
mt->provider->lg_stripesize = strtoumax(p, NULL, 0);
free(p);
return;
}
if (!strcmp(name, "stripeoffset") && mt->provider != NULL) {
mt->provider->lg_stripeoffset = strtoumax(p, NULL, 0);
free(p);
return;
}
if (!strcmp(name, "config")) {
mt->config = NULL;
return;
}
if (mt->config != NULL) {
gc = calloc(1, sizeof *gc);
if (gc == NULL) {
warn("Cannot allocate memory during processing of '%s' "
"element", name);
return;
}
gc->lg_name = strdup(name);
if (gc->lg_name == NULL) {
warn("Cannot allocate memory during processing of '%s' "
"element", name);
return;
}
gc->lg_val = p;
LIST_INSERT_HEAD(mt->config, gc, lg_config);
return;
}
if (p != NULL) {
printf("Unexpected XML: name=%s data=\"%s\"\n", name, p);
free(p);
}
if (!strcmp(name, "consumer") && mt->consumer != NULL) {
mt->consumer = NULL;
return;
}
if (!strcmp(name, "provider") && mt->provider != NULL) {
mt->provider = NULL;
return;
}
if (!strcmp(name, "geom") && mt->consumer != NULL) {
return;
}
if (!strcmp(name, "geom") && mt->provider != NULL) {
return;
}
if (!strcmp(name, "geom") && mt->geom != NULL) {
mt->geom = NULL;
return;
}
if (!strcmp(name, "class") && mt->geom != NULL) {
return;
}
if (!strcmp(name, "class") && mt->class != NULL) {
mt->class = NULL;
return;
}
}
static void
CharData(void *userData , const XML_Char *s , int len)
{
struct mystate *mt;
const char *b, *e;
mt = userData;
b = s;
e = s + len - 1;
while (isspace(*b) && b < e)
b++;
while (isspace(*e) && e > b)
e--;
if (e != b || (*b && !isspace(*b)))
sbuf_bcat(mt->sbuf[mt->level], b, e - b + 1);
}
struct gident *
geom_lookupid(struct gmesh *gmp, const void *id)
{
struct gident *gip;
for (gip = gmp->lg_ident; gip->lg_id != NULL; gip++)
if (gip->lg_id == id)
return (gip);
return (NULL);
}
int
geom_xml2tree(struct gmesh *gmp, char *p)
{
XML_Parser parser;
struct mystate *mt;
struct gclass *cl;
struct ggeom *ge;
struct gprovider *pr;
struct gconsumer *co;
int i;
memset(gmp, 0, sizeof *gmp);
LIST_INIT(&gmp->lg_class);
parser = XML_ParserCreate(NULL);
if (parser == NULL)
return (ENOMEM);
mt = calloc(1, sizeof *mt);
if (mt == NULL) {
XML_ParserFree(parser);
return (ENOMEM);
}
mt->mesh = gmp;
XML_SetUserData(parser, mt);
XML_SetElementHandler(parser, StartElement, EndElement);
XML_SetCharacterDataHandler(parser, CharData);
i = XML_Parse(parser, p, strlen(p), 1);
XML_ParserFree(parser);
if (i != 1) {
free(mt);
return (-1);
}
gmp->lg_ident = calloc(sizeof *gmp->lg_ident, mt->nident + 1);
free(mt);
if (gmp->lg_ident == NULL)
return (ENOMEM);
i = 0;
/* Collect all identifiers */
LIST_FOREACH(cl, &gmp->lg_class, lg_class) {
gmp->lg_ident[i].lg_id = cl->lg_id;
gmp->lg_ident[i].lg_ptr = cl;
gmp->lg_ident[i].lg_what = ISCLASS;
i++;
LIST_FOREACH(ge, &cl->lg_geom, lg_geom) {
gmp->lg_ident[i].lg_id = ge->lg_id;
gmp->lg_ident[i].lg_ptr = ge;
gmp->lg_ident[i].lg_what = ISGEOM;
i++;
LIST_FOREACH(pr, &ge->lg_provider, lg_provider) {
gmp->lg_ident[i].lg_id = pr->lg_id;
gmp->lg_ident[i].lg_ptr = pr;
gmp->lg_ident[i].lg_what = ISPROVIDER;
i++;
}
LIST_FOREACH(co, &ge->lg_consumer, lg_consumer) {
gmp->lg_ident[i].lg_id = co->lg_id;
gmp->lg_ident[i].lg_ptr = co;
gmp->lg_ident[i].lg_what = ISCONSUMER;
i++;
}
}
}
/* Substitute all identifiers */
LIST_FOREACH(cl, &gmp->lg_class, lg_class) {
LIST_FOREACH(ge, &cl->lg_geom, lg_geom) {
ge->lg_class =
geom_lookupid(gmp, ge->lg_class)->lg_ptr;
LIST_FOREACH(pr, &ge->lg_provider, lg_provider) {
pr->lg_geom =
geom_lookupid(gmp, pr->lg_geom)->lg_ptr;
}
LIST_FOREACH(co, &ge->lg_consumer, lg_consumer) {
co->lg_geom =
geom_lookupid(gmp, co->lg_geom)->lg_ptr;
if (co->lg_provider != NULL) {
co->lg_provider =
geom_lookupid(gmp,
co->lg_provider)->lg_ptr;
LIST_INSERT_HEAD(
&co->lg_provider->lg_consumers,
co, lg_consumers);
}
}
}
}
return (0);
}
int
geom_gettree(struct gmesh *gmp)
{
char *p;
int error;
p = geom_getxml();
if (p == NULL)
return (errno);
error = geom_xml2tree(gmp, p);
free(p);
return (error);
}
static void
delete_config(struct gconf *gp)
{
struct gconfig *cf;
for (;;) {
cf = LIST_FIRST(gp);
if (cf == NULL)
return;
LIST_REMOVE(cf, lg_config);
free(cf->lg_name);
free(cf->lg_val);
free(cf);
}
}
void
geom_deletetree(struct gmesh *gmp)
{
struct gclass *cl;
struct ggeom *ge;
struct gprovider *pr;
struct gconsumer *co;
free(gmp->lg_ident);
gmp->lg_ident = NULL;
for (;;) {
cl = LIST_FIRST(&gmp->lg_class);
if (cl == NULL)
break;
LIST_REMOVE(cl, lg_class);
delete_config(&cl->lg_config);
if (cl->lg_name) free(cl->lg_name);
for (;;) {
ge = LIST_FIRST(&cl->lg_geom);
if (ge == NULL)
break;
LIST_REMOVE(ge, lg_geom);
delete_config(&ge->lg_config);
if (ge->lg_name) free(ge->lg_name);
for (;;) {
pr = LIST_FIRST(&ge->lg_provider);
if (pr == NULL)
break;
LIST_REMOVE(pr, lg_provider);
delete_config(&pr->lg_config);
if (pr->lg_name) free(pr->lg_name);
if (pr->lg_mode) free(pr->lg_mode);
free(pr);
}
for (;;) {
co = LIST_FIRST(&ge->lg_consumer);
if (co == NULL)
break;
LIST_REMOVE(co, lg_consumer);
delete_config(&co->lg_config);
if (co->lg_mode) free(co->lg_mode);
free(co);
}
free(ge);
}
free(cl);
}
}
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